JS Motorsport
 
 
motorcycle
HIGH-PERFORMANCE
PARTS
FOR NORTON TWINS
JS Motorsport
4480 North Academy Avenue
Sanger, CA 93657
Phone/Fax: 559 875 0659
Email: jim@jsmotorsport.com
JS Motorsport Technical
Cutting piston tops for squish band

See diagram below for modifying your piston tops to clear the squish band when using our HI compression flat top pistons with a milled head. The example below is for a head that has been miiled .040" to achieve approx 11:1 C.R.